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प्रश्न
Explain the fact that in alkyl aryl ethers, the alkoxy group is ring activating and ortho/para directing towards electrophilic aromatic substitution.
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उत्तर
- Resonance structures of alkyl aryl ethers are as follows:
- The +R effect of −OR the group results in increased electron density at the para- and two ortho positions.
Hence, the alkoxy group in aromatic ether is a ring activating and ortho/para-directing group towards electrophilic aromatic substitution.
संबंधित प्रश्न
Anisole on heating with concentrated HI gives ______.
Choose the correct option.
Ethers react with cold and concentrated H2SO4 to form ________.
What is the action of atmospheric oxygen on ethers?
Write chemical equation of acetyl chloride with ethanol
Write the reaction between ethanol and acetic anhydride.
What are the limitations to prepare ether by this method?
What is the action of following on diethyl ether?
dil. H2SO4
What is the action of following on diethyl ether?
PCl5
In the following reaction:
\[\ce{Ether ->[Hot HI] A + B + H2O}\],
If A and B are identical, the ether is ____________.
Which of the following compounds does not contain \[\begin{array}{cc}\backslash\phantom{......}\\\ce{C = O}\\
/\phantom{......}\\\end{array}\] group?
Action of hydrogen iodide on anisole gives ______.
____________ on heating with excess of conc. HI gives two moles of ethyl iodide.
Which of the following statements is INCORRECT for ethers?
A mixed ether on hydrolysis gives ____________.
\[\ce{(CH3)2CH - O - CH3 ->[Cold HI] X + Y}\]
\[\ce{X ->[K2Cr2O7][dil. H2SO4] Z}\]
\[\ce{Y ->[NaOH(aq)][\Delta] CH3OH}\]
Identify X, Y and Z.
To prepare ethanol from methyl magnesium bromide, the other reagent required is ____________.
When methoxy benzene reacts with HI at room temperature the products formed are ______.
What are the products of the following reaction?
\[\ce{(CH3)3C - O - CH3 + HI ->[cold] ?}\]
Ether is obtained from ethyl alcohol in presence of H2SO4 at _______.
The compound which is not formed when a mixture of n-butyl bromide and ethyl bromide treated with sodium metal in the presence of dry ether is ______.
Formation of diethyl ether from ethanol is based oh a ______.
Ethers when dissolved in cold concentrated sulphuric acid forms ______.
